Numerical Aptitude

1. Three taps A, B and C together can fill an
empty cistern in 10 minutes. The tap A alone
can fill it in 30 minutes and the tap B alone in
40 minutes. How long will the tap C alone
take to fill it?(a) 16 minutes
(b) 24 minutes
(c) 32 minutes
(d) 40 minutes

2. If 1 man or 2 women or 3 boys can complete
a piece of work in 88 days, the 1 man, 1 women
and 1 boy together will complete it in(a) 36 days
(b) 42 days
(c) 48 days
(d) 54 days

3. If the measures of one side and cone
diagonal of a rhombus are 10 cm and 16 cm
respectively, then its are in cm2 is:(a) 60
(b) 64
(c) 96
(d) 100

4. The diameters of two cylinders, whose
volumes are equal, are in the ratio 3 : 2. Their
height will be in the ratio(a) 4 : 9
(b) 5 : 6
(c) 5 : 8
(d) 8 : 9